I continue to study the task scheduler O(1)

I do not understand what makes this part of the code?

1317 void kick_process(struct task_struct *p)
1318 {
1319         int cpu;
1320 
1321         preempt_disable();
1322         cpu = task_cpu(p);
1323         if ((cpu != smp_processor_id()) && task_curr(p))
1324                 smp_send_reschedule(cpu);
1325         preempt_enable();

link to source code: http://lxr.free-electrons.com/source/kernel/sched/core.c#L1317

what it means to do this function kick_process ?
I just met her for the first time

If you say I will be very grateful to you for your help